package com.thread.PCProblem;

//测试生产者消费者问题2:信号灯法,标志位解决
public class TestPC2 {
    public static void main(String[] args) {
        TV tv = new TV();
        new Player(tv).start();
        new Watcher(tv).start();
    }
}


//生产者
class Player extends Thread{
    TV tv;
    public Player(TV tv){
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i%2==0){
                this.tv.play("百家讲坛播放中");
            }else {
                this.tv.play("这是一个广告");
            }
        }
    }
}

//消费者
class Watcher extends Thread{
    TV tv;
    public Watcher(TV tv){
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            tv.Watch();
        }
    }
}

//产品
class TV{

    //演员表演,观众等待T
    //观众观看,演员等待F
    String voice;//表演的节目
    boolean flag = true;

    //表演
    public synchronized  void play(String voice){

        if (!flag){
            //如果标志位false ,观众在看,演员等待
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("演员表演了:"+voice);
        //通知观众观看
        this.notifyAll();//唤醒
        this.voice = voice;

        this.flag = !this.flag;
    }

    //观看
    public synchronized void Watch(){
        if (flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("观众观看了:"+voice);
        //通知演员表演
        this.notifyAll();
        this.flag = !this.flag;
    }
}
